Fig. 1. A in Middle Ordovician Drepanoistodus (Vertebrata, Conodonta) from Baltica, with description of three new species

Fig. 1. A. Map of the St. Petersburg region, Russia, with the distribution of rocks. The red rectangle shows the outline of the map area enlarged in B. B. Map of the Lynna River study locality and its surroundings. Figure modified from Lindskog et al. (2020, and references therein).